JBL PRX500 Series loudspeakers advantages: light weight, high sound pressure; excellent power amplifier and speakers to match the design of the speaker to play a good frequency response characteristics; built-in Class D digital amplifier circuit can be used to lower voltage level audio direct drive signal for: theater, multi-purpose hall, meeting room upscale senior concert hall, auditorium, lecture hall, small touring, senior entertainment performing arts venues, luxury KTV, etc.